Contacts of the helix formed by residues 16 - 47 (chain W) in PDB entry 3H1J


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ARG 16 (chain W).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416N  TYR*     5.0     6.7    -      -       +      -
    443N  TRP*     4.8    20.2    -      -       -      -
     12W  ALA      6.0     0.4    -      -       -      -
     13W  LEU      3.4     2.5    -      -       -      +
     15W  ARG*     1.3    89.4    -      -       +      +
     17W  THR*     1.3    66.1    +      -       -      +
     18W  SER*     3.0    34.0    +      -       -      +
     19W  THR*     2.8    38.8    +      -       +      +
     20W  PHE*     2.9    10.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 17 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416N  TYR*     3.7    17.0    +      -       -      -
    442N  TYR*     4.3     4.6    -      -       +      -
    443N  TRP*     3.9    42.5    -      -       +      +
   3005R  PEE      4.0    40.7    +      -       +      +
     15W  ARG      3.3     3.4    +      -       -      -
     16W  ARG*     1.3    72.7    -      -       -      +
     18W  SER*     1.3    61.1    +      -       -      +
     20W  PHE*     3.6     8.4    -      -       -      +
     21W  ALA*     3.3    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 18 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16W  ARG*     3.2    40.9    +      -       -      +
     17W  THR*     1.3    76.2    -      -       -      +
     19W  THR*     1.3    73.9    +      -       -      +
     20W  PHE      3.0     1.1    -      -       -      -
     21W  ALA*     2.8    24.5    +      -       -      +
     22W  LEU*     2.9    20.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 19 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12W  ALA      3.7    18.2    +      -       -      +
     13W  LEU*     2.7    26.8    +      -       -      -
     16W  ARG*     2.8    32.0    +      -       +      +
     18W  SER*     1.3    87.5    +      -       -      +
     20W  PHE*     1.3    52.0    +      -       -      +
     22W  LEU*     3.8     9.0    -      -       -      +
     23W  THR*     2.6    38.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 20 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37R  TYR*     3.8    20.0    -      -       +      -
     40R  THR*     4.0    13.9    -      -       +      -
     41R  ALA*     3.7    28.9    -      -       +      +
     44R  CYS*     4.3     2.9    -      -       -      -
   3005R  PEE      3.7    58.6    -      -       +      -
     13W  LEU      2.9    13.3    +      -       -      +
     14W  PHE*     3.7    33.4    -      +       +      +
     16W  ARG      2.9    13.3    +      -       -      +
     17W  THR*     3.6     9.6    -      -       -      +
     19W  THR*     1.3    77.7    -      -       -      +
     21W  ALA*     1.3    64.1    +      -       -      +
     23W  THR*     3.0     7.7    +      -       -      -
     24W  VAL*     3.0    32.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 21 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3005R  PEE      3.6    33.7    -      -       +      +
     17W  THR      3.3     9.5    +      -       -      +
     18W  SER*     2.8    10.6    +      -       -      +
     20W  PHE*     1.3    79.3    -      -       -      +
     22W  LEU*     1.3    69.9    +      -       +      +
     24W  VAL*     2.9    14.0    +      -       -      +
     25W  VAL*     3.0    17.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 22 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18W  SER*     2.9    24.1    +      -       -      +
     19W  THR*     3.9     7.6    -      -       -      +
     21W  ALA*     1.3    82.0    -      -       +      +
     23W  THR*     1.3    57.9    +      -       -      +
     25W  VAL*     3.3    11.7    +      -       +      +
     26W  LEU*     2.9    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 23 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41R  ALA*     5.4     4.3    -      -       +      -
     45R  VAL*     5.0     0.5    -      -       -      +
     13W  LEU*     3.5    43.9    -      -       +      +
     14W  PHE*     4.6    11.9    -      -       +      -
     19W  THR      2.6    25.2    +      -       -      -
     20W  PHE*     3.0     8.3    +      -       -      -
     22W  LEU*     1.3    79.1    -      -       -      +
     24W  VAL*     1.3    53.1    +      -       -      +
     26W  LEU*     3.7     5.9    -      -       +      +
     27W  GLY*     2.7    33.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 24 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41R  ALA*     4.0    13.0    -      -       +      +
     44R  CYS*     3.6    38.6    -      -       +      +
     45R  VAL*     3.9    18.3    -      -       -      +
     48R  ALA*     4.6     4.7    -      -       +      -
   3005R  PEE      4.1    26.0    -      -       +      -
     20W  PHE*     3.0    34.8    +      -       +      +
     21W  ALA      2.9     8.1    +      -       -      +
     23W  THR*     1.3    72.6    -      -       -      +
     25W  VAL*     1.3    67.3    +      -       -      +
     28W  ALA*     2.9    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 25 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3005R  PEE      3.6    44.1    -      -       +      +
     21W  ALA*     3.0    19.5    +      -       +      +
     22W  LEU*     3.5    13.7    -      -       +      +
     24W  VAL*     1.3    78.9    -      -       -      +
     26W  LEU*     1.3    66.3    +      -       +      +
     28W  ALA*     3.3     2.8    +      -       -      +
     29W  VAL*     3.1    30.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 26 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22W  LEU      2.9    16.9    +      -       -      +
     23W  THR*     3.7     7.4    -      -       -      +
     25W  VAL*     1.3    77.8    -      -       +      +
     27W  GLY*     1.3    66.3    +      -       -      +
     29W  VAL*     3.1    10.9    -      -       +      +
     30W  LEU*     3.1    46.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 27 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45R  VAL*     3.6    15.3    -      -       -      -
     23W  THR*     2.7    22.6    +      -       -      -
     24W  VAL      3.7     1.3    -      -       -      -
     26W  LEU*     1.3    70.3    -      -       -      +
     28W  ALA*     1.3    67.6    +      -       -      +
     30W  LEU*     2.9    10.5    +      -       -      +
     31W  PHE*     2.7    22.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 28 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45R  VAL*     3.1    23.1    -      -       +      +
     48R  ALA*     4.1    17.7    -      -       +      -
     49R  TYR*     4.9     3.4    -      -       +      +
   3005R  PEE      3.8    26.2    -      -       +      -
     24W  VAL      2.9    18.9    +      -       -      +
     25W  VAL      3.6     4.5    -      -       -      +
     27W  GLY*     1.3    67.7    -      -       -      +
     29W  VAL*     1.3    56.6    +      -       -      +
     31W  PHE*     4.1     2.6    -      -       -      -
     32W  GLU*     2.5    38.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 29 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3005R  PEE      3.8    26.9    -      -       +      +
     25W  VAL*     3.1    23.1    +      -       +      +
     26W  LEU*     3.1    13.2    -      -       +      +
     27W  GLY      3.0     0.6    +      -       -      -
     28W  ALA*     1.3    78.1    -      -       -      +
     30W  LEU*     1.3    68.6    +      -       +      +
     32W  GLU*     3.4     3.3    +      -       -      +
     33W  ARG*     3.3    37.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 30 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26W  LEU*     3.3    37.9    -      -       +      +
     27W  GLY*     2.9     8.6    +      -       -      +
     29W  VAL*     1.3    75.3    -      -       +      +
     31W  PHE*     1.3    67.1    -      -       -      +
     32W  GLU      3.3     0.2    +      -       -      -
     33W  ARG*     3.2    34.7    +      -       -      +
     34W  ALA*     3.0    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 31 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211Q  ILE*     3.5    26.9    -      -       +      -
    214Q  LEU*     4.3    20.6    -      -       +      -
     45R  VAL*     3.8    20.0    -      -       +      -
     46R  ALA*     4.9     6.1    -      -       -      -
     49R  TYR*     3.6    39.5    -      +       +      -
     27W  GLY      2.7    16.7    +      -       -      +
     28W  ALA      3.4     6.5    -      -       -      +
     30W  LEU*     1.3    74.7    -      -       -      +
     32W  GLU*     1.3    55.5    +      -       -      +
     34W  ALA*     3.5     5.0    -      -       +      +
     35W  PHE*     2.7    56.7    +      +       +      +
----------------------------------------------------------
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Residues in contact with GLU 32 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49R  TYR*     3.5    26.2    -      -       +      -
     52R  LYS*     2.7    36.6    +      -       -      +
     53R  ASN*     4.2     4.3    +      -       -      -
   3005R  PEE      3.1    26.7    -      -       +      +
     28W  ALA      2.5    21.6    +      -       -      +
     29W  VAL      3.5     4.5    -      -       -      +
     31W  PHE*     1.3    72.8    -      -       -      +
     33W  ARG*     1.3    67.6    +      -       -      +
     36W  ASP*     2.8    48.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 33 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29W  VAL*     3.3    19.1    +      -       -      +
     30W  LEU*     3.2    46.3    +      -       -      +
     32W  GLU*     1.3    81.0    -      -       -      +
     34W  ALA*     1.3    65.4    +      -       -      +
     36W  ASP*     3.9     3.5    -      -       -      +
     37W  GLN*     3.0    43.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 34 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30W  LEU      3.0    14.9    +      -       -      +
     31W  PHE*     3.5     7.6    -      -       +      +
     33W  ARG*     1.3    82.4    -      -       -      +
     35W  PHE*     1.3    64.0    +      -       -      +
     37W  GLN*     3.4     5.6    +      -       -      +
     38W  GLY*     3.0    19.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 35 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207Q  LYS*     3.6    37.0    -      -       +      -
    210Q  LEU*     3.7    31.2    -      -       +      -
    211Q  ILE*     3.5    30.1    -      -       +      -
     49R  TYR*     3.3    30.7    -      +       -      -
     31W  PHE*     2.7    48.7    +      +       +      +
     32W  GLU*     3.7     2.2    -      -       -      +
     34W  ALA*     1.3    74.6    -      -       -      +
     36W  ASP*     1.3    56.9    +      -       -      +
     38W  GLY*     3.2     0.6    +      -       -      -
     39W  ALA*     2.7    38.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 36 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207Q  LYS*     3.1    18.9    +      -       -      +
     49R  TYR*     2.5    25.7    +      -       -      -
     53R  ASN*     5.1     1.7    +      -       -      +
   3009R  PLC      3.7     4.7    +      -       -      -
     32W  GLU*     2.8    48.9    +      -       -      +
     33W  ARG*     3.9     3.7    -      -       -      +
     35W  PHE*     1.3    75.0    -      -       -      +
     37W  GLN*     1.3    61.6    +      -       +      +
     39W  ALA*     3.7     3.1    -      -       -      +
     40W  ASP*     2.6    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 37 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33W  ARG*     3.0    35.9    +      -       +      +
     34W  ALA*     3.8     5.2    -      -       -      +
     36W  ASP*     1.3    78.2    -      -       +      +
     38W  GLY*     1.3    65.3    +      -       -      +
     40W  ASP*     3.1     6.3    +      -       -      +
     41W  ALA*     2.8    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 38 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34W  ALA      3.0    11.7    +      -       -      -
     35W  PHE      3.7     2.2    -      -       -      -
     37W  GLN*     1.3    79.8    -      -       -      +
     39W  ALA*     1.3    55.8    +      -       -      +
     41W  ALA*     3.2     9.3    +      -       -      +
     42W  ILE*     2.9    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 39 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203Q  ARG*     5.7     0.9    -      -       -      -
    206Q  LEU*     3.8    10.1    -      -       +      +
    207Q  LYS*     3.7    38.4    -      -       +      -
    210Q  LEU*     5.2     5.6    -      -       +      -
     35W  PHE*     2.7    31.3    +      -       +      +
     36W  ASP      3.7     0.9    -      -       -      +
     38W  GLY*     1.3    70.7    -      -       -      +
     40W  ASP*     1.3    58.7    +      -       -      +
     42W  ILE*     3.1    12.7    +      -       -      +
     43W  PHE*     2.9    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 40 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203Q  ARG*     3.1    39.9    +      -       -      +
    207Q  LYS*     3.9    15.6    +      -       -      -
   3009R  PLC      4.8     9.4    -      -       -      +
     36W  ASP*     2.6    24.0    +      -       -      +
     37W  GLN*     3.5     5.4    -      -       -      +
     39W  ALA*     1.3    75.2    -      -       -      +
     41W  ALA*     1.3    57.8    +      -       -      +
     43W  PHE*     2.9     3.2    +      -       -      -
     44W  GLU*     2.7    47.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 41 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37W  GLN      2.8    13.6    +      -       -      +
     38W  GLY*     3.2    14.6    -      -       -      +
     40W  ASP*     1.3    75.8    -      -       -      +
     42W  ILE*     1.3    58.7    +      -       +      +
     44W  GLU*     3.8     6.0    -      -       -      +
     45W  HIS*     2.9    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 42 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206Q  LEU*     4.2    14.1    -      -       +      -
    210Q  LEU*     4.8    15.3    -      -       +      -
     38W  GLY      2.9    26.4    +      -       -      +
     39W  ALA*     3.4     9.9    -      -       -      +
     41W  ALA*     1.3    73.8    -      -       +      +
     43W  PHE*     1.3    60.9    +      -       -      +
     45W  HIS*     3.8     5.1    +      -       -      +
     46W  LEU*     3.0    50.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 43 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18Q  LEU*     3.3    32.3    -      -       +      -
     20Q  ALA*     4.1    18.2    -      -       +      -
    199Q  ASP*     3.7    21.5    -      -       +      -
    202Q  LYS*     4.1     7.9    -      -       +      -
    203Q  ARG*     3.2    70.7    -      -       +      +
    206Q  LEU*     4.1    14.6    -      -       +      +
     39W  ALA      2.9    13.6    +      -       -      +
     40W  ASP      3.4     6.5    -      -       -      +
     42W  ILE*     1.3    73.3    -      -       -      +
     44W  GLU*     1.3    67.9    +      -       -      +
     46W  LEU*     3.1    14.6    +      -       +      +
     47W  ASN*     3.2    33.2    +      -       -      -
     51W  LEU*     4.8     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 44 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203Q  ARG*     3.6    22.1    +      -       -      +
     40W  ASP*     2.7    32.9    +      -       -      +
     41W  ALA*     3.9     4.9    -      -       -      +
     43W  PHE*     1.3    72.9    -      -       -      +
     45W  HIS*     1.3    60.1    +      -       -      +
     47W  ASN      3.2    18.6    +      -       -      +
     48W  GLU*     3.3    11.8    +      -       -      +
     51W  LEU*     4.2    20.6    -      -       +      -
     53W  LYS*     3.0    47.6    +      -       -      +
     54W  HIS*     3.8    10.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 45 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41W  ALA      2.9    18.6    +      -       -      +
     42W  ILE*     3.8     6.3    -      -       -      +
     44W  GLU*     1.3    76.1    -      -       -      +
     46W  LEU*     1.3    74.8    +      -       +      +
     47W  ASN      2.9    10.6    +      -       -      -
     48W  GLU*     3.3    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 46 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18Q  LEU*     3.6    39.7    -      -       +      +
     19Q  SER*     5.7     0.7    -      -       -      -
    206Q  LEU*     5.2     0.4    -      -       +      -
     42W  ILE*     3.0    37.9    +      -       +      +
     43W  PHE*     3.1     9.7    +      -       +      +
     45W  HIS*     1.3    89.6    -      -       +      +
     47W  ASN*     1.3    66.2    +      -       -      +
     48W  GLU      3.8     0.9    -      -       -      -
     50W  LYS*     5.2     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 47 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18Q  LEU      2.7    26.4    +      -       -      -
     19Q  SER*     3.5     3.0    -      -       -      -
     20Q  ALA*     2.6    37.1    +      -       +      +
     43W  PHE*     3.2    33.3    +      -       +      +
     44W  GLU      3.3     4.7    -      -       -      +
     45W  HIS      2.9     2.2    +      -       -      -
     46W  LEU*     1.3    84.5    -      -       -      +
     48W  GLU*     1.3    64.4    +      -       -      +
     50W  LYS*     3.1    37.8    +      -       +      +
     51W  LEU*     3.8    11.4    -      -       +      +
     54W  HIS*     3.2    12.0    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il